Air register



July 27, 1943. R c. vR'ooM 2,325,443

AIR REGISTER Filed April 13, 1942 2 Sheets-Sheet 1 July 27, 1943. v R C VROQM 2,325,443

AIR REGISTER Filed April 13, 1942 2 Sheets-Sheet 2 IN V EN TOR.

@ik E70/@rf L P13001 Patented July 27, 1943 ICE AIR REGISTER Robert C. VroomMontclair, N. J., assigner to Peabody Engineering Corporation, New York, N. Y., a corporation of New York Application April 13, 1942, Serial No. 438,676

1,0 Claims. (Cl. 15s- 1.5)

This invention relates to air registers vor the like and more particularly 'to an air register Vfor use in a fuel burner of the'general type disclosed in Vroom Patent No. 2,210,476, dated Aug. 6, 1940. V M l In a burner of this type, anlair register ispro- `vided which may take the formV of a casing having peripheral doors through which air for combustion is admitted. The doors controly the direction and Velocity of the air and cause the same to form a rotating mass of air within the air register having a degree `of turbulence and a velocity of rotation adapted to promote the mixture of air and fuel for combustion. I

It is an object ofthe present invention to provideu a new andimproved means for controlling the velocity of air supplied through a system of the above type. Y' y ,l

Another object of the invention is to provide, in aburner of the above type,lme`ansf or controlling the velocity of thev airat the burner throat. Y Y

Another object is to provide, inv a4 burner lof the Vabove type, a plurality of air registers k'ar'- 'ranged in series with adjustable means toregulate the passage of 'air through said registers to the burner throat.4 Y V lil Suitable vanes I8 may be disposed about the Another object is to provide a multiple air reg- I ister' for burners of the above typehavng novel and improved details of construction and chari; acteristics of operation.

Various other'objects and advantages Will vbe apparent as the nature of the invention is more fully disclosed.

Although the novel features which are believed to be characteristic of this invention are pointed out more'particularly in' the claims appended hereto, the invention itself may be betterunderstood by referring to the` following description, taken in connection with fthe accompanying drawings` forming a part thereof in which a specic embodiment of the-invention. has been set forth for purposes of illustration. Y In the drawings, w Fig. 1 is a longitudinal-sectional view of a burnerembodyingthe present invention; and

Fig..2 is a transverse fsection taken on the line 2-2 .of Fig. 1. l ,Y Y

.In the following description and in theV claims certain Vspecific terms yhave been used for convenience in` referring to Variousfdetails ofthe Y invention. These terms, however, are to be given Y as broad an interpretationasothe state of` the art will permit. y Y

Referring to the drawings more in detail," the slopingsurface of part I6 for controlling the direction of air ilow at the burner throat.

The burner is shown as comprising a main air register having `a frontY plate I8 secured, as by bolts 20, to a plate 2I which is spaced from the plate 'I4 to form a plenum chamber 23 in which air is supplied under pressure to the register. A back plate 24 is secured to the front plate I5 by suitable means, such as stay bolts 25. VThe back plate 2'4 bears against a surface of part I6 for effecting an air seal. .In certain embodiments, such as, for example, an air register for use at atmospheric pressure, the register may be supported by securing the back plate 24 to the plate I4 in which event the plate 2I may be omitted.

Extending outwardly from the front plate I9 is Aa housing 2l which, in the embodiment illustrated, comprises a cylindrical side wall 28 closed by a front plate or wall 29. The front wall 29 of housing 28 is provided with a hub 3D in which a sleeve 3l is secured by suitable means such as a set screw 32. Atoinzer barrel 34 having an atomizer tip 35 and a diffuser 36 may be mounted Within the sleeve 3| and secured in position by a set screw 3l. The tip 35 and diffuser 36 are arranged to direct a stream of nely divided fuel into the burner throat. The atomizer barrel 34 may also carry a' coupling member 38 containing 'the Vfuel connections, not shown.

The atomizer barrel may be of the type disclosed more in detail in the Peabody Patent No. 1,628,424, dated May l0, 1927, and may comprise, for example, means for supplying fuel under pressure to the atomizer tip and for discharging the same in a ne cone-shaped spray. The operating capacity may be varied by varying the supply CII actuated by means of hinge bolts 4i which are v secured individually to said doors and are journaled in the back plate 2li and front plate I9 as shown in Fig. l. Each hinge bolt lil extends through the front plate i9 and carries a lug 42 having a slot engaged by a pin M. The pins 44 cooperating with the various lugs t2 are carried upon a ring 125 which is rotatably mounted on the front plate I3. Suitable means may be provided for operating the ring d5, shown for exam-- ple, as a pinion t6 carried on a shaft 41 and engaging a rack 48 on said ring. The shaft M' may be o-perated by suitable means suchY as a handle t9. The arrangement is such that actuation of the ring causes pivotal movement ofthe'lugs'llE and swings the doors i6 angularly about4 the axes of the hinge bolts" il so Vas to adjustV theopenings between said. doors. Inv certain` instances individual adjusting means may bey provided soV as to permit` individual adjustment of each'door.

y For the purpose of controlling the velocity. of air to the burner throat at very low capacities, thepresent invention provides a relatively small auxiliali7 air. register 5| which,l when not in use, is enclosed within the housing 2l, and which when required may be moved as a unit into registry with the burner throat, as will now be described. In the embodiment ofA the invention shown here for purposesor illustration, the `auxiliary air register 5i is similary in construction to the main air, register previously described. Accordingly, inorder to simplify the description; the corresponding partsof the auxiliary air register 5I will be designated by thev same reference numerals, but with primes amxed thereto.

The auxiliary air register 5| has a iront plate 52 and a rear plate 53. The front plate 52 has Ya wide peripheral flange 54 Which is guidedinside the; cylindrical wall 28, and contains an axial opening 55 through which Vthe atomizer barrel 34 extends. air-` register 5|V has a converging annular wall 56 upon which the vanes i8 are mounted, and adivergingor flaring annular wall 51 whichis adapted to register with the `flared surface I3 of the burner throat. The other structural elements-,of the auxiliary air register 5|, specically the stay bolts 25', air doors 40?, hinge bolts 4|', lugsV 42?, pinsl 4', ring 45', pinion f, and rack 48', aresimilar tothe correspondingly numbered elements of the main air register.

Axial movement of the auxiliary air register 5| into and out of the housing 23 is eiected by` a pair of elongated rodslii and El which are journaled in the front' plate 52 of auxiliary register 5|V and extend thro-ugh openings 62 and 63 inthe front Walll of housing 2l, the rods being provided with suitable handles 64 and 55, respectively. 'Ihe pinion i6 cooperating with rack 158 of auxiliary ail` register 5| is. secured tothe rodl 5B, hence rotation of rod 6G by means of. its handle 64 causes pivotal movement of the lugs 42' and swingsthe doors dill about the rods 4| se as to adjust the openings between saiddoors, in. a manner similar to the adjustment of the air doors i0 of the mainv register by means of handle i9V described above.' Fig. 1 shows inffull lines the auxiliary air register 5| seated in operative position Within the main air register, with The back plate '53 of the auxiliary the outer ilared Wall '5l of the auxiliary register in registry with the flared surface I3 of the burner throat; while in the dotted line position shown in Fig. l, the auxiliary air register 5| is withdrawn within the connues of the housing 2l.

Operation When the burner is to be operated at maximum capacity, the auxiliary air register 5| is withdrawn into the confines of the housing 21, which is the position illustrated in dotted lines in Fig. l,

' Vand under such conditions the auxiliary register 5|- plays no part in the operation of the burner. n operating the burner under such conditions, the atomier is set by suitable means for the required load, and the air doors 49 are adjusted by means of the handle 49 to cause the air to enter the main register with the desired direction and velocity to set up a whirling motion within theregister adapted to produce an efficient mixture of air and fuel at theburner'throat. Pressure in the plenum chamber 23 may also be varied so, as tov effect the desired air ow.

When it is desired to operate the burner at very low capacity, the auxiliary air register 5| is movedaxiallyfrom within the housing 21, by graspingk handles 64-and 65and forcing the rods 60 and 6| toward the right as viewed in Fig. 1, until the auxiliary register 5I- is seated wholly within the main register, with its flared surface 5.1 in registry with the burner-throat as shown infull linesin Fig. 1. The air door-s 40 of the auxiliary register are then adjusted by rotating the handle 64 to cause the air to enter the register Withthe desired direction and velocity to set up .awhirling motionwithin the auxiliarynregist'er adapted to produce the desired mixturev of air and fuel at the burner throat |3. When the'fauxiliary. air register 5| is-thus utilized, the air doors 0.0i themainfregisterare opened wide toadmit freely the desired flow of air from the plenum chamber to the auxiliary register.

'Ifhegauxiliary air register 5l, when utilized in the manner described above, not only maintains thev velocity of the air: to the burner throat at reduced capacities-by reason of the reduced size of the auxiliary air doors 40', but likewise re duces the effective throat area to anl extent commensurate with the reduced air flow. Under such conditions, by properly'adjusting the main air doors 40 as well as the auxiliary air. doors 40', the capacity off the burner mayl be varied accurately over an extremely wide range while maintaining desired register and throat velocities.

Although a specific embodiment of the invention hasbeen shown for purposes of illustration, it is to be understood that various changes and modifications may be made therein as will be v,readilyv apparentto a person-.skilled in the art. The invention, therefore, is only to belimited in accordance with. Vthe scope of the appended claims.

What is claimed ist l. In a burner having a throat-andfuel supply means adapted to introduce fuel for combustion, a main'air'register comprising a wall having adjustable air inlet openings therein, an auxiliary air register within said main air register, saidl auxiliary air register comprisinga Wall having adjustable air 'inlet ports therein and arranged to receive air through said'ports 'from said main` air register and to control the flow thereofl to said burner throat, said auxiliary air register having means to reduce the effective areaof said burner throat. i r A 2. In a burner'having fuel supply means adapted to introducefuel for combustion, a main air register comprising a set of air doors overlapping when closed to form the peripheral Wall of an air. register chamber and..being adjustable' to regulate the supply of air to said chamber, and an auxiliary air register within said main air register chamber, said auxiliary air register likewise comprising a set of air doors overlapping when closed and adjustable to receive and regulate the supply of air from said main air register. 3. In a burner having a throat and fuel supply means adapted to introduce fuel for combustion, a main air register comprising a set of 'air doors overlapping when closed to form the peripheral wall of an air register chamber and being adjustable to regulate the supply of air to said chamber, an auxiliary air register within said main air register chamber, said auxiliary air register likewise comprising a set of air doors overlapping when closed and adjustable to re-` ceive and regulate the supply of air from said main air register, said auxiliary register having means to reduce the effective area of said burner throat.

4. In a burner having a throat and an atomizer for introducing finely divided fuel for combustion, a main air register comprising front and back walls and a set of air doors overlapping when closed to form with said Walls an air register chamber and being adjustable angularly to control the air ow therethrough, a housing on the front wall of said main air register opening into said chamber, and an auxiliary air register movably mounted in said housing and adapted to be moved axially into said chamber, said auxiliary air register likewise comprising a set of air doors overlapping when closed and adjustable to control the air ilow therethrough.

5. In a burner-having a throat and an atomizer for introducing iinely dividedfuel for combustion, a main air register comprising front and back walls and a set of peripheral air doors overlapping when closed to form with said Walls an air register chamber and being adjustable to control the air flow therethrough, a housingon the front wall of said main air register opening into said chamber, an auxiliary air register movably mounted in said housing and adapted to be mcved'axially-into said chamber, said auxiliary air register likewise comprising a set of peripheral air doors overlapping when closed and adjustable to control the air flow therethrough,

and means Vcn `said auxiliary air register `co-` operating with said burner throat to reduce the effective throat area when 'said auxiliary air .register is in operative position in said chamber.

6. In a burner having a flared throat and an atomizer for introducing finely divided fuel for (Si)v air register for adjustable positioning Within said combustion, a main air register Acomprising front and back walls and a set of peripheral air doors overlapping when closed to form with said walls an air register chamber and being adjustable angularly to control the flow therethrough, a housing on the front wall of said main'air register opening into saidV chamber, an auxiliary air register movably mounted in saidhousing and adapted to be moved axially into said chamber, said auxiliary air register likewise comprising a set of air doors overlapping when closed and adjustable to 4control the air flow therethrough, and a flared annular back plate on said auxiliary air register adapted to Cooperate with said flared burnerthroat to reduce the effective throat" area when saidauxiliary air register is in operativezpostion in said chamber.

, 7. A burner comprising athroat, an atomizer barreland means including an atomizer tip and diffuser for :introducingfinely divided fuel Afor combustion, a Vmain air register comprising'front and back wallsv and a set of peripheral air doors cooperating therewith, Vsaid doors overlapping when closed to form with said walls an air register chamber and being adjustable angularly to control the air flow therethrough, a cylindrical housing on the front Wall of said main air register opening into said chamber, an auxiliary air register movably mounted in said housing and adapted to be moved axially of said atomizer barrel into said chamber, said auxiliary air register likewise comprising a set of air doors overlapping when closed and adjustable angularly to control the air flow therethrough, a flared annular throat plate on said auxiliary air register adapted to cooperate with said burner throat to reduce the effective throat area, and means for moving said auxiliary air register into and out of operative position.

8. A burner comprising a throat, an atomizer barrel and means including an atomizer tip and diffuser for introducing finely divided fuel for combustion, a main air register for supplying air to said burner comprising front and back walls and a set of peripheral air doors cooperating therewith, said doors overlapping when closed to form with said Walls an air register chamber and being adjustable angularly to control the air flow therethrough, a cylindrical housing on the front Wall of said main air register opening into said chamber, an auxiliary air register movably mounted in said housing, said auxiliary air register likewise comprising a set of air doors overlapping when closed and adjustable to control the air flow therethrough, a flared annular throat plate on said auxiliary air register adapted to vcooperate with said'burner throat to reduce the effective throat area, means including a rod extending outwardly through said housing for advancing said auxiliary air register into operative position and for retracting said auxiliary register into said housing, and means controlled by said rod forY adjusting the doors of said auxiliary air register.

9. In a burner having a throat and fuel supply means adapted to introduce fuel for combustion, an air register comprising Walls forming an air register chamber communicating with said throat, said walls having a peripheral set of adjustable air inlet openings therein to control the air flow into said chamber, an auxiliary air register having a second set of peripheral adjustable air inlet openings of smaller area than the first mentioned set, means mounting said auxiliary chamber with said second set of openings interposed in the path of air flow from said first set of openings to said throat for controlling the air flow to said throat at lower operating capacities and for retraction out of the path of air flow in said chamber topermit control by said first openings at higher capacities.

l0. In a burner having a throat and fuel supply Vmeans adapted to introduce fuel for combustion,

an air register comprising walls forming an air register chamber communicating with said throat, said walls having a set of adjustable air inlet openings therein to control the air flow into said chamber, an auxiliary air register havirg a second Vset :of .adiius'table air n'let wopehings Y of fsmalier vearea ythan ,the first mentioned eet; means mounting said auxiliary vair register for said secon-disetof openings interposed in lthe path ofair fiow from said first -setfof openings -to'said throatifror controlling fthe air-flow to said throat att-loweroperating capacities and for vretraction out of iv.the ipah tof air flow in ssad 'chamber Ato permit control iby ssaid vvrst -ropenings :at higher Acapacities, and a throat piece movable With'said 

